If the 2013 doesn't have NPP, consider the cost of an aftermarket exhaust before deciding which is cheaper. My 1LE is white and i love it but it is a pain to keep clean, sooo much brake dust. The hood vent in the '14 would be nice too, seems like my engine bay gets really hot. The only thing I don't like about the '14 is the rear end... like most people it seems.
If you're like me, you'll be listening to the NPP instead of the radio. I thought the backup camera was standard and mats are much cheaper just about anywhere other than the dealership. And, white wasn't your first color choice. I'd probably wait... if you don't mind the '14 tail lights.